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== Bidirectional text control ==
{{main|Bi-directional text}}
Unicode supports standard bidirectional text without any special characters. In other words Unicode conforming software should display right-to-left characters such as Hebrew letters as right-to-left simply from the properties of those characters. Similarly, Unicode handles the mixture of left-to-right-text alongside right-to-left text without any special characters. For example, one can quote Arabic (“بسم الله”) (translated into English as "Bismillah") right alongside English and the Arabic letters will flow from right-to-left and the Latin letters left-to-right.
However, directionality may not be detected correctly if left-to-right text is quoted at the beginning of a right-to-left paragraph (or ''vice versa''),<ref name="segan"/> and the support for bidirectional text becomes even more complicated when text flowing in opposite directions is embedded hierarchically, for example if == Variation selectors ==
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